:root{--bg: #f2f4f7;--panel: #ffffff;--ink: #1a1d29;--muted: #6b7280;--primary: #1d4ed8;--primary-ink: #ffffff;--danger: #dc2626;--border: #e2e5ea;--seat-empty: #eef1f6;--seat-occupied: #bfdbfe;--seat-occupied-ink: #1e3a8a;--aisle: #d8dce3;--radius: 12px;color-scheme:light}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-tap-highlight-color:transparent}.app{display:flex;flex-direction:column;min-height:100vh}.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:8px;padding:10px 12px;padding-top:max(10px,env(safe-area-inset-top));background:var(--primary);color:var(--primary-ink)}.brand{font-weight:700;font-size:1.05rem;white-space:nowrap}.bus-select{flex:1;min-width:0;padding:8px 10px;border-radius:8px;border:none;font-size:1rem;font-weight:600}.btn.icon{width:40px;height:40px;border-radius:50%;font-size:1.1rem;background:#ffffff2e;color:var(--primary-ink);border:none;flex-shrink:0}.error-banner{background:#fee2e2;color:#991b1b;padding:10px 14px;font-size:.9rem;cursor:pointer}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:40px 20px;text-align:center;color:var(--muted)}.tabs{display:flex;background:var(--panel);border-bottom:1px solid var(--border);position:sticky;top:56px;z-index:15}.tabs button{flex:1;padding:12px 8px;border:none;background:none;font-size:.95rem;font-weight:600;color:var(--muted);border-bottom:3px solid transparent}.tabs button.active{color:var(--primary);border-bottom-color:var(--primary)}.content{flex:1;overflow-y:auto;padding:12px 12px 40px}.bus-shell{max-width:480px;margin:0 auto;background:var(--panel);border:1px solid var(--border);border-radius:24px;padding:16px 10px 24px}.bus-front{display:flex;align-items:center;justify-content:space-between;background:var(--aisle);border-radius:14px;padding:10px 14px;margin-bottom:14px;font-weight:600;font-size:.9rem;color:var(--muted)}.bus-rows{display:flex;flex-direction:column;gap:8px}.bus-row{display:grid;grid-template-columns:1fr 14px 1fr;align-items:stretch;gap:6px}.aisle{height:100%;min-height:44px;background:repeating-linear-gradient(to bottom,var(--aisle) 0 6px,transparent 6px 12px);width:2px;justify-self:center}.seat-group{display:flex;flex-direction:column;gap:4px;border:1px solid var(--border);border-radius:10px;padding:6px}.seat-group-number{font-size:.8rem;font-weight:700;color:var(--muted)}.seat-group-slots{display:flex;flex-direction:column;gap:4px}.seat-slot{display:flex;align-items:center;gap:6px;min-height:32px;border-radius:6px;border:1px solid var(--border);background:var(--seat-empty);padding:4px 8px;cursor:pointer;text-align:left}.seat-slot.occupied{background:var(--seat-occupied);border-color:#93c5fd}.seat-slot-label{font-size:.7rem;font-weight:700;color:var(--muted);width:16px;flex-shrink:0}.seat-slot.occupied .seat-slot-label{color:var(--seat-occupied-ink)}.seat-slot-value{font-size:.8rem;font-weight:600;color:var(--seat-occupied-ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.seat-slot-value:empty:before{content:"+";font-weight:400;color:#9ca3af}.seat-group-empty{visibility:hidden}.seat-slot.drag-over{background:#fef9c3;border-color:#facc15;outline:2px solid #facc15;outline-offset:-2px}.seat-slot.dragging{opacity:.4}.seat-drag-ghost{position:fixed;top:0;left:0;z-index:100;pointer-events:none;background:var(--primary);color:var(--primary-ink);font-size:.8rem;font-weight:700;padding:6px 10px;border-radius:8px;box-shadow:0 4px 10px #00000040;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}body.seat-dragging{overflow:hidden;-webkit-user-select:none;user-select:none}.door-box{display:flex;align-items:center;justify-content:center;text-align:center;border:1px dashed var(--border);border-radius:10px;padding:6px;font-size:.75rem;font-weight:700;color:var(--muted)}.bus-back{text-align:center;margin-top:16px;font-size:.8rem;color:var(--muted)}.sheet-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:flex-end;justify-content:center;z-index:50}.sheet{width:100%;max-width:480px;background:var(--panel);border-radius:18px 18px 0 0;padding:10px 18px 24px;padding-bottom:max(24px,env(safe-area-inset-bottom));max-height:82vh;overflow-y:auto}.sheet-handle{width:40px;height:4px;background:var(--border);border-radius:2px;margin:4px auto 14px}.sheet h2{margin:0 0 12px;font-size:1.05rem}.sheet-current{display:flex;align-items:center;justify-content:space-between;background:var(--seat-empty);padding:10px 12px;border-radius:10px;margin-bottom:14px;gap:10px}.sheet-search input{width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--border);font-size:1rem;margin-bottom:10px}.sheet-warning{background:#fee2e2;color:#991b1b;border-radius:10px;padding:10px 12px;font-size:.85rem;margin-bottom:10px}.sheet-add-new{width:100%;margin-bottom:10px;text-align:center}.sheet-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;max-height:40vh;overflow-y:auto}.sheet-list .btn{width:100%;text-align:left}.sheet-empty{color:var(--muted);font-size:.9rem;padding:10px 0;list-style:none}.sheet-close{width:100%;margin-top:16px}.roster{max-width:480px;margin:0 auto}.roster-add{display:flex;gap:8px;margin-bottom:14px}.roster-add input{flex:1;padding:10px 12px;border-radius:10px;border:1px solid var(--border);font-size:1rem}.roster-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.roster-row{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:10px 14px}.roster-info{display:flex;flex-direction:column;min-width:0}.roster-name{font-weight:600}.roster-seat{font-size:.8rem;color:var(--primary)}.roster-seat.unassigned{color:var(--muted)}.roster-actions{display:flex;gap:6px;flex-shrink:0}.btn{border:1px solid var(--border);background:var(--panel);color:var(--ink);padding:10px 14px;border-radius:10px;font-size:.9rem;font-weight:600;cursor:pointer}.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn.danger{background:#fee2e2;border-color:#fecaca;color:var(--danger)}.btn.ghost{background:none}.btn.small{padding:6px 10px;font-size:.8rem}.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.login-card{width:100%;max-width:340px;background:var(--panel);border:1px solid var(--border);border-radius:18px;padding:28px 22px}.login-brand{font-size:1.3rem;text-align:center;margin-bottom:18px;color:var(--ink)}.login-error{margin-bottom:14px;border-radius:10px}.bus-form{display:flex;flex-direction:column;gap:14px}.bus-form label{display:flex;flex-direction:column;gap:6px;font-size:.85rem;color:var(--muted);font-weight:600}.bus-form input{padding:10px 12px;border-radius:10px;border:1px solid var(--border);font-size:1rem;color:var(--ink)}.bus-form-actions{display:flex;gap:10px}.bus-form label.checkbox-label{flex-direction:row;align-items:center;gap:8px}.checkbox-label input[type=checkbox]{width:18px;height:18px}.bus-form-actions .btn{flex:1}@media (min-width: 640px){.content{padding:24px}}.print-header{display:none}@media print{.no-print,.sheet-backdrop{display:none!important}@page{margin:.5in}body{background:#fff}.content{overflow:visible;padding:0}.bus-shell{max-width:100%;margin:0;padding:0;border:none;border-radius:0}.print-header{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:12px;border-bottom:2px solid #000;padding-bottom:8px}.print-header-name{font-size:1.3rem;font-weight:700;color:#000}.print-header-date{font-size:.8rem;color:#333}.bus-front{background:none;border:1px solid #000;color:#000}.bus-row{break-inside:avoid}.seat-group,.door-box{border:1px solid #000}.seat-group-number{color:#000}.seat-slot{background:none!important;border:1px solid #999}.seat-slot-label,.seat-slot-value{color:#000!important}.seat-slot-value:empty:before{color:#999}.aisle{background:none;border-left:1px dashed #999;width:0}.bus-back{color:#000;border-top:1px solid #000;padding-top:8px}}